Dynamo-electric machine.



A. H. NEULAND. DYNAMO ELECTRIC MACHINE. "memos FILED mg. 10. I915.

Patented May 14, 1918.

2 SHEETS-SHEET IN VEN TOR.

WITNESSES A. H. NEULAND.

DYNAMO ELECTRIC MACHINE.

APFLlCATION men mi. 10. 1915.

Patented May 14, 1918.

2 SHEETS-SHEET 2.

INVENTOR. WM WM. A

Min ATT NEYS.

WITNESSES:

lation.

UNITED STATES PATENT OFFICE.

.Hl? val k ALFONS H. nEuLaNn'oF NEW roman. Y.

DYNAMO-ELQCTQIC MACHINE5;

sgecln cation, of letters lfatent.

BettentedMay 14, 1918.

Applicationfiled Felir uary 10. 1915. serial ifi'o. 722231 following isa'full,clear, andexact-description. A -41 n My invention relates todynamo-electric machines and particularly-i0 I alternators, and oneobject of my invention 'is the-production of such a machine, which, withrelatively low angular and peripheralspeed of its rotative parts, willgenerate a ourrent having a frequency suitable for wireless signaling.

Another object is the-simultaneous'genera- (ion of such currents ofvarious irequencies with a constant speed of rotation and the renderingof'these currentss'avai able' ffor use either selectively or"simultaneously, without altering the speed ofii'btationt Another objectis 'to provide Slllh-ifd machincin"which'the rotative parts will ber'r'ecof all windings.

Another object is the ohtai'ning ofa hi h output"by-polarizing aunidirectional fie d and forming strong lnagnetio poles;

Another object is the provision of suio able means for rigidlysupporting the-flaminated flux conductors in closely spaced-1e Othergeneral objects oi-myinvent-ionere simplicity and lightness ofconstruction and eflici'ency inoperation. r qgh,

Still other objects and advantages of -my invention will appear from thefollowing description.-

Tn carrying out my invention, Leniploy a stator having the armature orinduced-winding disposed circumferentially-abopt -itand a field memberor sourcemf unidlrectional magneto motive force so arranged that thelines of force act upon the entirecircumference of the armatureorinduced winding.

I also provide two concentric cooperating series of spaced circularlyarranged magnetic conductors, the two series being rotative relative toeach other, the-magnetic conductors of one series being arranged tosuccessively radially aline with those-pf jhe other series as theyarerelativeiy'motated, and thus provide a revolving magnetic path forthe flux, and in eflect'lproducing-a revolving-field. This is preferablyeflf'ected by the dilferenee n number or the magnetic conductors in "thetwo series-the number of points iojf 'alineinent being? dependent .uponthe number of conductors by which the-two series difl'er." It is evidentthat this rotative magnetic path may be iproduced by liut a singleririgin 'eachseries era plurality of jringsf ih eahhgseries the pluralitybeing em- =ployed to hrealc' the path of the flux more eiiect ii elynwthe non alined portions, and to enable the iiicrease of themagneto-motive force of the -fi'eld .without increasing'the flux;density: This enables a larger armature current flhw an; the windingsand results in a greater errtput. i

i The apnatdi-e r-indiited winding is arranged so as tobe traversed bythe revolvin afia atneeux; and thereby to have potential inducedtherein, and it is composed of one?! 'more 'paii's of pole windings,each pole-mnding-prefferahly being a complete coil dr sser, more turns'gthe suecessi e and adjacent-edil's'; or p'plelwindin "-hein oppositelyorrevrsely wound. 'T e fiel flux consists o itwo components, that is, theone cutting the clockwise windings and the "one cutting the counterclockwise windings, and, as uill latcrhppear, one of the flux componentspredominates over the other, and the rotation of the magnetic pathcauses these components to alternately ,cut each coil or pole"winding',and t'hus generates apotential therein. 1, therefore, in thespecification and. claiims,"use the term predominating=flux componenttoudesignate that component of the unidirectional field which is thelarger component and generates an E. M, F. which determines thedirection of the current in the induced Winding, and I use the termopposed flux component? to designate the -lesser component of theunidirectional field, which generates an E. M. F. in opposition to thatgenerated by the predominating flux component. The foregoing featuresare broadly discloshd' and claimed in n1y7prior Patent No. 1,211,617, ofJ anu'ary 9 191 ln my said formerapplication the flux is made toalternate as well as to revolve'iand the frequency per revolution in thestationary winding is determined by the number of magnetic conductors onthe rotating pait In accordance with my present invention in order toincrease the frequency' 'per revolution without an increase in thenumher'of magnetic conductors, I employ" a plurii'lity of thesercvcrscly wound coils within the space from one point of ahncment of theflux conductors to the next successive point of alinomenl. In order toprovide for the genoration of a plurality of different frequenciessimultaneously, without changing the speed of-the rotors, I employ anumber of separate windinvs on the stator, each having a differentnuinicr of pairs of pole Windings between the successive points of fullalinemcnt, and I employ switches for selectively connecting any or allof these windings into the external circuit. Since, as above pointedout, the frequency generated in the windings depends upon the numbers ofpairs of coils or pole windings between the successive points ofalinement of the flux conductors, the variation in the number of pairsof pole windings in the different armature or induced windings willeffect the desired difference in frequency.

Also in order to increase the frequency of the generated current, Iprovide for making the two series of. magnetic conductors rotatable inopposite directions, thus increasing the frequency of the alinements ofthe successive magnetic conductors of the two series.

If a large number of pole windings between alined points is used, thepredominating fluxmay only slightly exceed the 0pposed flux, resultingin a relatively small potential difference, I employ means fordecreasing or reversing the opposed flux, thereby increasing theeffective flux. This is done by polarizing the unidirectional field bymeans of a current of proper phase supplied to the induced or armaturewinding. In the present instance this polarizing current is supplied bycondensers across the terminals of the induced winding or windin s.

urther, in accordance with my invention, to mount or support thelaminated flux conductors in closely spaced relation, I employ a flangemember carrying on one side a ring of non-magnetic material, which ispreferably integral therewith, and the ring is pro vided with spacedradial slots around its entire circumference, into which laminated steelstanipings are inserted. The flange member is also provided on its otherside with a circumferential slot which intersects all the radial slotsin the ring, thereby forniing a rectangular opening in the inner end ofeach slot, into which the inner ends of the laminations are inserted andfit. The outer ends of the laminations are joined to gether by a ring ofpreferably non-magnetic material, which holds the laminations rigidly inplace, and which is preferably insulated from the ring and from thelaminations to eliminate waste currents in the solid metal ortions.

My invention also comprehends various other features of construction andarr-angrments and combinations of parts. as will hereinafter more fullyappear.

1 shall now describe the embodinn-nt of my invention illustrated in theaccompany ing drawings, and shall thereafter point out my invention inclaims.

Figure 1 is a transverse vertical section, partially diagrammatic. of amachine enibodying my invention, taken on the line 1-1 of Fig. 2;

2 is a central longitudinal section of the same;

Fig. 3 is an enlarged detail in elevation, of the rings supporting thelaminated flux conductors, as viewed from their outer ends. the tongueson the outer ends being omitted for the sake of clearness;

Fig. 4 is a detail of one of the laminated flux conductors, showingsections of the end retaining ring and of the insulation slight y searated;

ig. 5liS a plan of a laminated tlux conductor;

Figs. 6, 7 and 8 are diagrams of the three armature windings and theirrespective cir cuits, Fig. 6 showing the armature winding composed ofone pair of pole windings, F 1, :7 that composed of two pairs of polewindings, and Fig. 8 that composed of three pairs of pole windings.

Figs. 6,;6",' and 6, are diagrams representing the flux cutting thearmature winding shown in Fig. 6 under the conditions when there is nocondenser current, when the magneto-motive force of the condensercurrent just equals that of the opposed flux. and when it exceeds theopposed flux, re spectivel Figs. 7 and 7 are similar diagramsrepresenting the flux cutting the armature winding shown in Fig. 7 underthe same conditions, respectively.

Figs. 8, 8" and 8 are similar diagrams representing the flux cutting thearmature winding shown in F ig. 8. under the same conditions,respectively.

In the illustrated embodiment of my in vention the magnetic fluxtraverses the stator and two oppositely rotatable members, the field andarmature or induced windings being carried by the stator. thus leavingthe rotatable members free of all windings. The stator comprises anannular laminated. soft iron stator element or core, 1, provided at itsinner periphery with a circumferential series of longitudinalinduced-winding-re ceiving slots or openings 2. preferably notintersecting the inner periphery. as shown. The induced windings arearranged in these slots, as will be hereinafter described.

The laminated stator element 1 is arranged within and carried by anannular portion of the housing of the machine, which is shown asintegral with one of the side plates 3, the

housing being completed by a complementary side plate 4. The housing isstationary, being carried by the base 5 of the machine. and the sideplates are provided with hub portions 3 and i. respectiirely, whichserve as bearings for the rotative parts. The source of magnetic flux isshown as a field coil 6 fitted over and carried by an annular rib orflange 7 on the inneiface of the side plate 3.

Each rotatable member comprises a series of circumfcrentially arrangedequally spa ccd laminated flux conductors. the two series being arrangedconcentrically within the stator element 1.. and preferably each seriesis composed of a plurality of spaced circular sets or rings. here shownas two. the rings of the two members being arranged in alternaterelation When assembled. as shown. As above explained. the constructionfor supporting and spacing the laminated couductors is such as to permitof their close spacing. while at the same time furnishing a rigidsupport therefor. My invention with respect to this construction.however. is not. claimed broadly herein. but is claimed in my Patent No.1'.237.944 of August 21. 1917. The two opposing flange members 8 and 9of non-magnetic material. are disposed in parallel planes at rightangles to the axis of the machine. and are mounted for rotation inopposite directions. The flange memher 8 has on its inner face the twospaced concentric rings or annuli 10 and 11. integral therewith. And theflange member 5) also has on its inner face the two similarly spacedintegral concentric annuli 12 and 13. The four annuli are of suchdiameter and are so spaced that the fit together in close relation andalternate from the exterior to the interior. the annulus 10 being theoutermost and closely associated with the stator core 1. and the annulus13 being the innermost. and the annulus 12 being disposed Within theannular space between the annuli 10 andll. and the annulus ll'beinigdisposed within the annular space between the annuli 12 and 13. 7'

Each flange" member is provided on its outer face withtw'ocircumferential grooves 14. respectivel i opposite the? two annuli. andeach annulus is provided witliequaliy and closely spaced radial slots15, which extend part Way into the flange member and intersect therespective grooves 14, thereby forming rectangular holes 16. Thelaminated flux condiictors 17' fit into the slots l5 and are of suchWidth as tobe flush with the faces of the annuli. A tongue is formed oneach end of the flex conductors l7 .'l:-hat on one end enteudin-gthrough the opening '16 into the groove 14. The outer ends of the annuliare reduced in thickness to form a circumferential tongueconforming tothat on the outer ends of'the'flwx conductors 17.

and a grooved end ring 18 fits on this tongue and that of the outer endsof the flux conductors and thus locks the flux conductors securely intheir respective slots. To eliminate waste currents. an annularinsulation 19 is interposed between the retaining ring 18 and theannulus.

For convenience of reference the series of liux conductors on the member8 may be referred to as the outer series. and that on the member 9 asthe inner series. There are fifty-nine equally spaced conductors 17 inthe outer series, this number of course beiimduplicated in each circularset of the series and those of the two sets being in radial alinement;and there are sixty equally spaced conductors 17 in the inner series. Itis therefore apparent that the conductors of the two series will. bealined at one point of the circumference and will be progressively moreand more off-set between the point of complete alincment and a pointopposite the point of alinemcnt, at which latter point they will becompletely staggered or off-set. M'anifestly the number of points atwhich the flux conductors on the two members uliuc is determined thenumber of conductors by which the two series difl'cr. and it. forinstance, those on one member exceed those on the other member by two.there will be two points of full alinemcnt with two points of completeoff-set.

It. is obvious that the rotation of one of the two rotative members fora distance equal to the pitch of the flux conductors of that member.will cause the conductors oi the two series to progressively aline frompoint of full alinement to point of full aliherhent, which in theillustrated mnstruction is 360. thus causing the circumferentialregression of the magnetic path formed by t '6 usiind conductors for acomplete revolution. In other words. the relative angnitar velocitybetween the magnetic path amzl the tWo rotatable members is 59 to 1 and60 tol, respectively, that is. each revolntioii of the outer series ofconductors causes the closed magnetic path to make fifty-ninerevolutions and each revolution of the: inner series of conductorscauses the closed inaignetic path to'niakc sixty revolutions. While thesimultaneous revolution of both series in opposite direction causes thepath' to make a number of revolutions equal to the sum of the conductorsin the two series. or one hundred and nineteen.

The outer series of flux conductors is ca 1'- ried by a soft ir'on'rotative core member 20, which is a solid casting and which forms waitof the: magnetic path, the flange memi er 8 being mounted upon theperiphery of the core member 20 outside of the radial plane of thestator element 1. and the Core member 20 also carries on its peripheryan annular laminated soft iron complementary core element 21 in theradial plane of the stator element 1 and of the cooperating series offlux conductors 17. This complementary core element 21 is provided onits outer periphery with a series of fifty-nine equally spaced teeth 22,which are in radial alinement with the fifty-nine flux conductors of theouter series in the annuli 10 and 11, and which coiiperate therewith informing a closed magnetic path.

The two rotors are driven by the motors 23 and 24, respectively, in thedirections indicated by the arrows. The rotor of the motor 24 is fixedon the outer end of the central shaft 25, which bears at the endadjacent the motor 24: in the hub 4. and at the other end in thetransmission for the other rotor, anti friction bearings being provided,as indicated. The hub portion of the flange member 9 is also keyed tothe shaft 25 just inside of the side plate 4, and through thisconnection rotation is transmitted to the inner series of magneticconductors. The hub of the core member 20 of the other rotor is keyed toa sleeve 26 surrounding the shaft 25 and bearing at its inner end in thehub portion of the flange member 9, and at its outer end in the hub 3,anti-friction bearings being provided, as indicated. The rotor of themotor 23 is fixed to a stub shaft 27 arranged in line with the shaft 25,and the stub shaft 27 is coupled to the sleeve 26 by a coupling member28, to which the stub shaft and sleeve are both keyed, and which forms abearing for that end of the shaft 25, as shown. Through this connectionrotation is transmitted from the motor 23 to the outer series of fluxconductors.

It is now clear that the rotation of the two rotatable elements inopposite directions produces a rotating unidirectional magnetic fieldwhich has many times the velocity of the elements, and this rotatingmagnetic field cuts the windings on the stator element 1 and induces ahigh frequency potential therein. In my said former application, inwhich a revolving field is produced by the rotation of one element, thecircumferential distance from one point of full alinement to the nextsuccessive point of full alinement, consisting of one alined portion andone unalined portion, constitutes a pole pair, and the two portionsrespectively oppose two properly spanned pole windings, and in thisconstruction the frequency per revolution of the generated current isdetermined by the number of teeth on the rotated element. In accordancewith my present invention, I increase the frequency per revolution ofthe generated current by providing more than one pair of pole windingswithin this space. I also provide for the simultaneous generation of aplurality of different frequencies without changing the speed ofrotation, by employing a plurality of independent armature windings,each having a different number of pairs of pole windings within thespace from one point of full almement to the next successive point offull alincment. This is of particular advantage in wireless signalingwhere it is often desirable to change quickly from one frequency toanother, and with embodiments of my invention this can be done by merelyconnecting one or another of the armature windings into the consumingcircuit by means of switches.

In the illustrated construction I have shown three independent armaturesor induced windings, 29, 30, and 31, circumferentiall arranged on thestationary core 1 in the olcs or slots 2. The windings are arranged in aseries of coils, the successive coils being oppositely wound and twosuccessive coils forming a pair of pole windings. The lowest frequencyis generated in that winding which is composed of as many pairs of polewindings as the number of flux conductors by which the two seriesdiffer, or in the illustrated construction, in a winding composed of onepair of pole windings. As the number of pairs of pole windings isincreased the frequency is correspondingly increased, the frequency perrevolution being determined by adding the number of flux conductors inone series to that of the second series, and multiplying the sum by thenumber of pairs of pole windings within the space from one point of fullalinement to the next successive point of full alinement. Since in theillustrated machine there is but one point of full alinement, thisdistance is 360, and I have therefore shown the winding 29 as composedof one pair of pole windings, and the winding 30 as composed of twopairs of pole windings and the winding 31 as composed of three pairs ofpole windings. These coils are shown diagrammatically in Figs. 6, 7 and8, respectively. These are merely examples of possible windings,although the number of pairs of pole windings within the space betweenthe successive points of alinement may be increased to a certain limit,which will be later ex lained. The flux conductors 17 are preferab ythin, as is shown in the drawing, in order that the fully or partlyalined conductors will substantially oppose only one pole winding whenthe span or pitch of the windings is small on account of there beingrelatively a large number of them.

Since the flux at all points of the circumference is unidirectional, theflux through the pole windings may be divided into two components, onetraversing all clockwise pole windings and one traversing allcounterclockwise pole windings. When the center of the alined portionopposes the center'of a clockwise pole winding, the flux componenttraversing all clockwise pole windings will be larger than the fluxcomponent traversing masses all. counter-clockwise pole windings, andthe latter flux component generates a potential smaller than and inopposition to that generated by the first component.

predominating flux component. and the lat:- leias the opposed fluxcomponent.

It wiil. new be seen that as the number of pairs of pole windingsbet-ween two successive points of alinement is increased; thepredominance of the predominating flux over the opposed flux becomesless, other condi tions remaining constant, and, as previouslyindicated, there is. therefore, a limit beyond which the polewindingscannot practically be increased. When the number of pairs of polewindingslcetwecn two points of alinement is large, the predominatingflux may he only slightly larger than the opposed flux, resulting inrather Weak field poles and only a small active flux and terminalpotential difference; In accordance with my invenlion I provide {orarmature excitation which serves to form powerful magnetic field poles.

This means consists. in the embodiment shown, of means for supplying amagnetiz" ing'current to the armature windings which is substantially inline or in phase with the point of full alinemeut of-the flux conductorsand with the flux, and with all other points opposed by similarly woundpole windings. Specifically, this source of magnetizing current is oneor more condensers 32 connected across the terminals of each armaturewinding as indicated in Figs. 6. T and 8. The magneto-motive force dueto the armature magnetizing current is, at the said points, in the samedirection as that, due to thafiel d current, and hence it mat riallystrengthens allthe poles traversed by the predominating flu): component.Since; in the form hown. all the pole windings are connected in series,themagnetizing current is of equal magnitude in that half ot' the polewindings which is traversed by the. op-" posed flax (xamponenii. Hence,tlie arms lure magnetiaingcurrent in the latter \vn nlmgs opposes themagneto-metric force" ol the field. and if the two are eqnal'the opposedflux through these pole windings is eliminated. When the armaturemagnesia ing magnetmmotive force exceeds the field magneto-motivetor-cc; the flux through the pole win-dings traversed by: the opposinflux is reversed, and isno longer an oppose L flux. but is now activeand must be added to the predominating flux since'itgenerates in thewindings a potential-which is in the same direction as that due to the.prcdom mating flux.

This phenomenon is illustrated in the diagrams of Figs. 6 to 8. Thesediagrams are developments otthe fluxes and the windings, and representthe conditions which obtain during one revolution of'the magnetic field.

The first. coin poneut will hereinafter be referred to as the liigs. fi'ffi 'and 6 represent the flux cutting the 'vinding :29 of Fig. 6,first, when thereis no armature magneto motive force by reasonofcondenser excitation, second, when the annature magneto-motive torcebyrea"- son of the condenser excitation just equals the field magnetomotive force, and third, when the armature magneto-motive force byreason oi the condenser excitation exceeds the field magneto-motiveforce. The active flux, that is. the difference. between thepredoanimatingand opposed flux, is re n'esented by the shaded area.Since the induced wiuding'29' has but one pair of pole windings. eachpole winding spans 180 mechanical degrees, and hence there is but onecycle during a. revolution of the field, and the distancebetiween thelines A and B. which is 180 electrical degreesis also 180 mechanicaldeg-recs.- 'Ehe predominating flux compouent is cutting the pole windingwhich spans the space between the lines A and B; and the opposed fluxcomponent is cutting the other 'pole winding which spans the space from'line B to, line A. The quantity oi opposed iiux is represented hy'theareas 7;, 7i 'and"therefore the areas a, a, which are equivalent to theareas 7), b. are deducted from the: predominating flux area, leavin theactive-flux represented by the shade" ortion.

In the condition represented by Fig. 6. the armature magneto-motiveforce by rcir son 'of the condcnser excitation just'neutralizesillG'fiPPOSGd flux while ai the same time increasing the redominatingflux, and therefore. not on y isthe area representing thcpredhminatinllux larger than in Fig. o hut it'is all s adedto represent active flux.sincc the areas 7), b are eliminated and hence the equivalent areas a,a.

In the condition represented by Fig. 6,

not only is'tl'ic'predomhiitiiifflgfl uii still further increasedjhy thegreater amnature magneto-motive forcei but/the opposed'fiux has now beenreversed and has'become actives as. represented by the areasl)" b; theentire actii'e fiiix being represented the sum oi the shaded portionsboth above and below the line? Figs; 7, 7" and 7 represent the fluxtraversii'ig the" indl'l'ced' Wiiidliigflfl of Fig. 7' under the threesame respective conditions. new. since the span of'each pole winding isbut 90*; there are twoc cles. for each revolution ol'tlfe magnetic eld",andli'enc'e the distance betweenthe lines A and'B, which rcpre sentsthespan ofthe several pole wind ings. is 180 electrical degrees. Readingtoward theriglit. the two pole windings spanning thespaces between thelines A and B. are traversed by predominating fl'l'lY components. whilethose Spanning the two spaces between lines Band A are traversed byopposed' fiux components. Hence the areas c, a, d, d, representpredominating flux, and the areas 6, b, c, 0, represent opposed flux.The areas a, a substantially neutralize the areas d, d and the areas 6,b substantially neutralize the areas a, a, thereby leaving the shadedarea as the active flux.

In Fig. 7", as in Fig. 6", the opposed flux is eliminated and thepredominating flux components are increased by the armaturemagneto-motive force, and hence the areas (Z, d have now become activepoles. In Fig. 7, as in Fig. 6, the predominatin flux components arestill further increased, and the opposed flux components are nowreversed and have become active, the entire active flux beingrepresented by the shaded portions both above and below the line.

Figs. 8, 8* and 8 represent the flux traversing the induced winding 31of Fig. 8. Here there are three cycles to each revolution of themagnetic field, since the span of each pole winding is but 60, andtherefore in the diagram the distance between the lines A and B, whichis the distance spanned by each pole winding, is 180 electrical degrees,but only 60 mechanical degrees. Here again, reading toward the right,the three pole windings spanning the spaces between the lines A and Bare traversed by predominating flux components, while those spanning thethree spaces between the lines B and A are traversed by opposed fluxcomponents. Hence the areas a, a, d, d, e, 6, represent predominatingflux, and the areas 6, b, c; c, f, f, represent opposed flux. The areasi, f substantially neutralize the areas 6, e, t e areas 0, csubstantially neutralize the areas at, cl, and the areas 72, bsubstantially neutralize the areas a, a, thereby leaving the shaded areaas the active flux.

In Fig. 8", as in Figs. 6" and 7*, the opposed flux is eliminated,andthe predominating flux components are increased, and hence the areas0? d, e, e have now become active poles. In B ig. 8, as in Figs. 6 andthe redominatin flux components are stlll furt er increasecfi and theopposing flux components are reversed and have become active, asindicated.

Thus it will be seen that, while the field current establishes the twoflux components, fixes the frequency in the several windings and inducesa potential therein, serving to energize the condenser, the condensercurrent polarizes the field and creates power- :t'ul magnetic poleswhich enable the generation of large quantities of current.

As is shown in Figs. 6, 7 and 8, switches 33 are provided which controlthe connection of the condensers into the armaturepr induced circuits,and also the connection of the armature or, induced windings into theexternal circuit 34.

It is manifest that with embodiments of my invention large quantities ofhigh hequency currents, either single-phase or poly phase, suitable forpurposes of Wireless signaling, may be produced with but low angular andperipheral velocity of the rotat- 111g parts, and that the frequency ofthe current may readily be changed without changing the speed of therotating parts.

It is obvious that various modifications may be made in the constructionshown in the drawings and above particularly described, within theprinciple and scope of my invention.

I claim:

1. A dynamo-electric machine comprising a source of magnetic flux, astator, two concentric rotors mounted co-axially with the stator androtatable in opposite directions, the three members being traversed bythe magnetic flux and each rotor comprising a series of. spaced magneticconductors and the conductors of one series diifering in number fromthose of the other series. whereb the conductors of the two series willra ially aline at at least one point progressively as the two rotors areoppositely rotated and thereby form a revolving closed magnetic path forthe flux having greater angular velocity than the relative angularvelocity of the rotors, and an induced winding adapted to be traversedby the magnetic flux and arranged to have a potential generated thereinas the magnetic path and flux revolve.

2. A dynamoelectric machine comprising a source of magnetic flux, astator, two c011- centric rotors mounted co-axially with the stator androtatable in opposite directions, the three members being traversed bythe magnetic flux and each rotor comprising a series of spaced magneticconductors and the conductors of one series differing in number fromthose of theother series, whereby the conductors of the two series willradially uline at at least one point progressive] as the two rotors areoppositely rotate and'thereby form a revolving closed magnetic path forthe flux having greater angular velocity than the relative angularvelocity of the rotors, and an induced winding circumferentiallyarranged within the magnetic field and comprising a pair of oppositelywound pole windings arranged in succession within the angular distancefrom one point of full alinement of the magnetic conductors to the nextsuccessive point of full alinement, whereby the revolving magnetic pathand flux cause the twopole windings to be alternately cut bypredominating and opposed flux components generatin a resultant E. M. F.in the induced winding commensurate with the difference between the fluxcomponents.

3. A dynamo-electric machine comprising a source of magnetic flux, astator member, afiux directing member comprising a series essees ofspaced magnetic conductors circumferentially arranged concentric withthe stator, a;

rotor member ha ring a series of spaced magnetic conductors arrangedconcentric with those of the first series and differing in numbertherefrom, the three members being lra versed by the magnetic flux,whereby the conductors of the two series will radially aline at at leastone point progressively as the rotor is rotated and thereby form a rei'olving closed magnetic path for the flux having a. higher angularvelocity than that of the rotor, and a plurality of independent inducedwindings adapted to be traversed by the magnetic flux andso arranged asto be simultaneously acted upon by the re tolving flux and to have adifferent frequcncy generated thereby in each of said windings.

l. A dynamo-electric machine comprising a source of magnetic flux, astator member, a flux directing member comprising a series of spacedmagnetic conductors circumferentially arranged concentric with thestator, a rotor member having a series of spaced magnetic conductorsarranged concentric with those of the first series and differing innumber therefrom, the three members being traversed by the magneticfluxwhereby the conductors of the two series will radially aline at atleast one point progressively as the rotor is rotated and thereby form arevolving closed magnetic path for the flux having a higher angular'elocitg, than that of the rotor, and a. plurality of inde Ven dentinduced windings circumferentia-ly arranged within. the magnetic fieldand having res 'iectively different numbers of pairs ol oppositely woundpole windings arranged in succession within the angular distance fromone point of full alinement oi the n'iagnetic conductors to the nextsuccessive point of full alinement, whereby a dif ferent frequency isgenerated in each induced winding as the closed magnetic path and fluxare revolved.

5. In a dynamo-electric machine, a magnetic circuit formed partly of aseries of laminated flux conductors rotatable in one direction and asecond series of flex conductors adjacent to the first series androtatable in the opposite direction, the flux conductors of one seriesbeing so arranged with respect to those of the other that when the fluxconductors of one series are alined with the: flux conductors of theother series m on 7 portion of the machine they are unalined in anotherpart of the machine, means for producing a magnetic flux through themagnetic circuit, and a plurality of independent induced windingsadapted to be traversed by said flux and each comprising a plurality ofpole windings, the pole windings of each induced winding differing inpitch from the corresponding pole windings of the other inducedwindings, whereby with a uniform speed of rotation potentials ofdifferent frequencies are generated in said induced windings.

6. In a dynamo-electric machine, a mag netic circuit formed partly of aseries of laminated flux conductors rotatable in one direction and asecond series of flux condnctors adjacent to the first series androtatable in the opposite direction. the flux conductors of one seriesbeing so arranged with respect to lthose of the other that when the fiuxconductors of one series are alincd with the flux conductors of theother series in one portion of the machine they are unalined in. anotherpart of the mai'zhilw means for producinga magnetic flux tlnrough themag netic circuit,-and a plurality of independent induced windingsadapted tov be traversed by said flnxrand each comprising a plurality oipole windings. the adjacent pole windings oifrcaclrinduccd winding beingwound in opposite directions and the pole windings of each inducedwinding differing in pitch from the corresponding pole windings of theother induced \viudin s, whereby with a uniform speed of rotationpotentials of ditierent frequencies are generated in said inducedwindings.

T. A dynamo-electric machine comprising a sonrce'of magnetic flux, astator member, a fiux directing member comprising a series of spacedmagnetic conductors circumferentially arranged concentric with thestator, a rotor member having a series of spaced magnetic conductorsarranged concentric with those of the first series and differing innumber therefrom, the three members being traversed by the magneticflux. whereby the coi'ulnctors of. the two series will radially alinc atat least one point progressively as the rotor is rotated and therebyform a revolving closed magnetic path for the flux hai'inga higherangular velocity than that ofthe rotor, a plurality of independentinduced windings circmnferentially arranged within the magnetic fieldand having respectively different numbers of pairs of o-p positelywoundpole windings arranged in snore ionn'ithin the angular distancefrom onep t of full alincment of the magnetic condnctorsto the nextsuccessive point of full alinen ent, whereby a diii'crcnt. frequen cyisgenerated in each induced winding as the closed magnetic path and fluxare revolved, and nicans for independently connectingthe several inducedwindings to an externalcircuit.

8. A dynamo-electric machine comprising a source of magnetic flux, astator, two concentric rotors mounted co-axially with the stator androtatable in. opposite directions, the three members being traversed bythe magnetic flux and each rotor comprising a series of spaced magneticconductors and the conductors of one series dillering in number fromthose of the other series, whereby the conductors of the two series willradially aline at at least one point progressively as the two rotors areoppositely rotated and thereby form a revolving closed magnetic path forthe flux having greater angu ar velocity than the relative angularvelocity of the rotors, and a plurality of independent induced windingscircumferentially arranged with in the magnetic field and havingrespectively diflerent numbers of pairs of oppositely wound polewindings arranged in succession within the angular distance from onepoint of full alinement of the magnetic conductors to the nextsuccessive point of full alinement, whereby a diflerent frequency isgenerated in each induced winding as the closed magnetic path and fluxare revolved.

9. The combination of a dynamo-electric machine comprising a source ofmagnetic flux, a stator and a rotor traversed by said flux and includingmeans for producin a revolving closed magnetic path for the ux as therotor rotates, the flux path rotating at a higher angular velocity thanthat of the rotor, an induced winding circumferentially disposed in themagnetic field and comprising a plurality of pairs of pole windings, thetwo pole windings of each pair being 0 positely wound, the clockwisewindings an the counter clockwise windings being alternately traversedby a predominating and an opposed flux component as the magnetic pathand flux rotate, generating thereby a resultant E. M. F. in the inducedwinding commensurate with the difference between the flux components;and means for supplying a magnetizing current to said winding of suchphase as to produce strong magnetic field poles strengthening thepredominating flux component and weakening the opposed flux component.

10. The combination of a dynamo-electric machine comprising a source ofmagnetic iux, a stator and a rotor traversed by said flux and includingmeans for producin a revolving closed magnetic path for the ux as therotor rotates, the flux path rotating at a higher angular velocity thanthat of the rotor, an induced winding circumferentially disposed in themagnetic field and comprising a plurality of pairs of pole windings, thetwo pole windings of each pair being oppositely wound, the clockwisewindings and the counter clockwise windings being alternately traversedby a predominating and an opposed flux component as the magnetic pathand flux rotate, generating thereby a resultant E. M. F. in the inducedwinding; commensurate with the difference between the flux componentsand a condenser acted upon by said potential and arranged to supply amagnetizing current to said winding of such phase as to establish strongmagnetic field poles strengthening the predominating flux component andweakening the opposed flux component.

11. The combination of a dynamo-electric machine comprising a source ofmagnetic flux, a stator and a rotor traversed by said flux and includingmeans for producing a revolving magnetic path for the flux as the rotorrotates, a plurality of induced windings circumferentially disposedwithin the magnetic field and each comprising a difl'erent number ofairs of pole windings, the pole windings 0? each pair being oppositelywound, whereby a different frequency is generated in each inducedwinding as the rotor rotates; and a condenser connected in circuit witheach induced winding and arranged to be acted upon by the potentialgencrated in said winding and to supply a magnetizing current to saidwinding, thereby establishmg strong field poles, and means forindependently connecting the several induced windings to an externalcircuit.

12. The combination of a dynamo-electric machine comprising a source ofmagnetic iux, a stator, two concentric rotors mounted co-axially withthe stator and rotatable in opposite directions, the three members beingtraversed by the magnetic flux and each rotor comprising aseries ofspaced magnetic conductors and the conductors of one series differing innumber from those of the other series, whereby the conductors of the twoseries will radially aline at at least one point progressively as thetwo rotors are oppositely rotated and thereby form a revolving closedmagnetic path for the flux having greater angular velocity than therelative angular velocity of the rotors, an induced windingcircumferentially arranged within the magnetic field and comprising apair of oppositely wound pole windings arranged in succession within theangular distance from one oint of full alinement of'the magnetic conuctors to the next successive point of full alinement, whereby therevolving magnetic path and flux cause the two pole windings to bealternately out by predominating and opposed flux components enerating aresulting E. M. F. in the induce winding commensurate with thedifi'erence between the flux components; and means for supplying amagnetizing current to said winding of such phase as to produce strongmagnetic field poles coiiperating with the predominating flux componentand acting against the opposed flux component.

13'. The combination of a dynamo-electric machine comprising a source ofmagnetic flux, a stator, two concentric rotors mounted co-axially withthe stator and rotatable in opposite directions, the three members beingtraversed by the magnetic flux and each rotor comprising a series ofspaced magnetic conductors and the conductors of one series difiering innumber from those of the other series. whereby the conductors of the twoseries will radially aline at at least one point progressively as thetwo rotors are oppositely rotated and thereby form a revolving closedmagnetic path for the flux having greater angular velocity than therelative angular velocity of the rotors, an induced windingcircumferentially arranged within the magnetic field and comprising apair of oppositely wound pole windings arranged in succession within theangular distance from one point of full alinement of the magneticconductors to the next successive point of full alinemcnt, whereby therevolving magnetic path and flux cause the two pole windings to be alternately cut by predominating and opposed flux components generating aresultant E. M. l in the induced winding commensurate with thedifference between the flux components, and a condenser acted upon bySaid potential and arranged to supply a magnetizing current to saidwinding strengtlr cning the predominating flux component and reversingthe opposed flux component, thus polarizing the field.

14. The combination of a dynamo-elec trio machine comprising a source ofmagnetic flux. a stator member, a flux directing member comprising aseries of spaced magnetic conductors circumferentially arrangedconcentric with the stator, a rotor member having a series of spacedmagnetic conductors arranged concentric with those of the first seriesand differing in number therefrom, the three members being traversed bythe magnetic flux, whereby the conductors of the two series willradially aline at at least one point progressively as the rotor isrotated and thereby form a revolving closed magnetic path for the fluxhaving a higher angular velocity than that of the rotor. a plurality ofindependent induced windings circumferentially arranged within themagnetic field and having respectively different numbers of pairs ofoppositely wound pole windings arranged in succession within the angulardistance from one point of full alinement of the magnetic eonductors tothe next successive point of full alinement, whereby a differentfrequency is generated in each induced Winding as the closed magneticpath and flux are revolved; and means for supplying a magnetizingcurrent to each of said induced windings in line with the magnetic pathand establishing strongimagnetic field poles.

15. The combination of a dynamo-electric machine comprising a source' ofmagnetic flux, a stator member. a flux directing member comprising aseries of spaced magnetic conductors circumferentially arrangedconcentric with the stator, a rotor member having a series of spacedmagnetic conductors arranged concentric with those of the first seriesand differing in number therefrom, the three members being traversed bythe magnetic flux. whereby the conductors of the two series willradially aline at at least one point progressively as the rotor isrotated and thereby form a revolving closed magnetic path of the fluxhaving a higher angular velocity than that of the rotor, a plurality ofindependent induced windings circumferentially arranged within themagnetic field and having respectively different numbers of pairs ofoppositely wound pole windings arranged in succession within the angulardistance from one point of full alinement of the magnetic conductors tothernext successive point of full alinement, whereby a differentfrequency is generated in each induced winding as the closed magneticpath and flux are revolved; a condenser adapted to be connected incircuit with each induced winding and to be acted upon by the potentialgenerated in said winding and to supply a magnetizing cur rent to saidwinding and establish strong field poles, and means for independentlyconnecting the several induced windings to an external circuit.

16. A dynamo-electric machine comprising a source of magnetic flux, astator, two concentric rotors mounted co-axially with the stator androtatable in opposite direc tions, the three members being traversed bythe magnetic flux and each rotor compris ing a series of spaced magneticconductors and the conductors of one series difiering in number fromthose of the other series, whereby the conductors of the two series willradially alinc at at least one point progressively as the two rotors areoppositely rotated and thereby form a revolving closed magnetic path forthe flux having greater angular velocity than the relative angularvelocity of the rotors a plurality of independent induced windingscircumferentially arranged within the magnetic field and havingrespectively different numbers of pairs of oppositely wound polewindings arranged in succession within the angular distance from onepoint of full alinement of the magnetic conductors to the nextsuccessive point of full alinement, whereby a different frequency isgenerated in each induced winding as the closed magnetic path and fluxare revolved, and means for independently connecting the several inducedwindings to an external circuit.

17. A dynamo-electric machine comprising a source of magnetic flux, anannular stator and two annular series of regularly spaced magneticconductors traversed by said flux, one series of magnetic conductorsbeing rotative and the conductors of the two series differing in number,whereby they will successively radially aline as the one series isrotated and form a revolving closed magnetic path for the flux, and aplurality of induced windings arranged on the stator circumferentiallythereof and each having a different number of pairs of pole windingsdisposed within the angular space from one point of full alinement ofthe magnetic conductors to the next successive point of full alinement,whereby a different frequency is generated in each induced winding asthe closed magnetic path is revolved.

18. A dynamo-electric machine comprising an annular stator, meanscarried by the stator for producing a unidirectional magnetic field, twoconcentric rotors mounted co-axially with the stator and rotatable inopposite directions, the three members being traversed by the magneticflux and each rotor comprising a series of spaced magnetic conductorsand the conductors of one series differing in number from those of theother series, whereby the conductors of the two series will aline at atleast one point progressively as the two rotors are oppositely rotatedand thereby form a revolving closed magnetic path for the flux having ahigher angular velocity than the relative velocity of the two rotors,and an induced winding circumferentially arranged within the magneticfield and comprising a pair of oppositely wound pole windings arrangedin succession within the angular distance from one point of fullalinement of the magnetic conductors to the next successive point offull alinement, whereby the revolving magnetic path and flux cause thetwo pole windings to be alternately cut by predominating and opposedflux components generating a resultant E. M. F. in the induced windingcommensurate with the difierence between the flux components.

19. A dynamo-electric machine comprising an annular stator, meanscarried by the stator for producing a unidirectional magnetic field, twoconcentric rotors mounted co-axially with the stator and rotatableinopposite directions, the three members being traversed by the magneticflux and each rotor comprising a series of spaced magnetic conductorsand the conductors of one series difl'ering in number from those of theother series, whereby the conductors of the two series will aline at atleast one point progressively as the two rotors are oppositely rotatedand thereby form a revolving closed magnetic path for the flux having ahigher angular velocity than the relative velocity of the two rotors,and a plurality of independent induced windings circumferentiallyarranged within the magnetic field and having respectively difl'erentnumbers of pairs of oppositely wound pole windings arranged insuccession within the angular distance from one point of full alinementof the magnetic conductors to the next successive point of fullaliuciucnl, whereby a different l re quency is generated in each inducedwinding as the closed magentic path and flux are rcvolved.

20. The combination of a dynamo-electric machine comprising an annularstator, means carried by the stator for producing a unidirectionalmagnetic field, two conccir tric rotors mounted co axially with. thestator and rotatable in opposite directions, the three members beingtraversed by the magnetic flux and each rotor comprising a series ofspaced magnetic conductors and the conductors of one series differing innumber from those of the other series, whereby the conductors of the twoseries will alinc at at least one point progressively as the two ro torsare oppositely rotated and thereby form a revolving closed magnetic pathfor the flux having a higher angular velocity than the relative velocityof the two rotors, a plurality of independent induced windingscircumferentially arranged within the magnetic field and havingrespectively difierent numbers of pairs of oppositely wound polewindings arranged in succession within the angular distance from onepoint of full alinement of the magnetic conductors to the nextsuccessive point of full alinement, whereby a difierent frequency isgenerated in each induced Winding as the closed magnetic path and fluxare revolved; a condenser adapted to be connected in circuit with eachinduced winding and to be acted upon by the potential generated in saidwinding and to supply a magnetizing current to said winding andestablish strong field poles, and means for independently connecting theseveral induced windings to an external circuit.

21. In a dynamo-electric machine, a rotor comprising a flange portionprovided on one side with a projecting annulus and on the other sidewith a circumferential groove opposite the annulus, the annulus beingprovided with slots intersecting the circumferential groove, and alaminated flux conductor fitting into each slot and having a tongueextending into the circumferential groove through the opening formed bythe intersection of said groove with the respective slot.

22. In a dynamo-electri machine, a rotor comprising a flanged portionprovided on one side with a projecting annulus and on the other sidewith a circumferential groove opposite the annulus, the annulus beingprovided with slots intersecting the circumferential groove, a laminatedflux conductor fitting into each slot and havin a tongue extending intoits circumferential groove through the opening formed by theintersection of said groove with the respective slot, and removableannular retaining means attached to the opposite end of the annulus .andengaging the ends of all of the conductors and serving to hold theconductors in their slots.

ing a source of magnetic flux, a stator member, a flux directing membercomprising a series of spaced magnetic conductors circumfcrentiallyarranged concentric with the stator, a rotor member having a series ofspaced magnetic conductors arranged concentric with those of the lirstseries and differingin number therefrom, the three members beingtraversed by the magnetic flux,

whereby the conductors ofthe two series will radially aline at at leasten point progres si vely as the rotor is rotated and thereby form arevolving closed magnetic path for the flux having a higher angularvelocity than that of the rotor, and an induced winding adapted to betraversed by the inagneticlinx and arranged to have a potentialgenerated therein asthe magnetic path and flux revolve.

:24. A dynamo-electric machine comprising a source of magnetic flux,afitntor memher, a flux directing member comprising a series of spacedmagnetic conductors circunn l'erentially arranged concentric with thestator, a rotor member having a series of spaced magnetic conductorsarranged concentric with those of the first series and diftering innumber therefrom the three members being traversed by the magnetic flux,whereby the conductors of the two series will radially aline at at leastone point progres sively as the rotor is rotated and thereby form arevolving closed magnetic path for the flux having a higher angularvelocity than that of the rotor, an. induced winding adapted to betraversed by the magnetic flux and arranged to have a potential'enerated therein as the magnetic path anc flux revol ve, and means forsupplying a magnetizing current in said winding of such phase as toproduce strong magnetic field poles strengthening the component of theflux tmversing the alined portion of the magnetic path and weakening thecomponent traversing the non-alined portion.

35. A dynamo-electric machine comprising a source of magnetic flux, astator member. a flux directin member comprising a series of spacedmagnetic conductors circumt'erentially arranged concentric with thestator a rotor member having a series of spaced magnetic conductorsarranged concentric wit 11 those o the first series and differing innumber the efrom. the three members being Iraversed by the magneticflux, whereby the conductors of the two series will radially a1 ine atat least one point progressively as the rotor is rotated and therebyform a revolvlug closed magnetic path for the flux having a higherangular velocity than that of the rotor, an induced winding adapted tobe traversed by the magnetic flux and arranged ,to have a potentialenerated therein as the magnetic path and flux revolve, and a condenseracted upon by said potential and ar- A dynamo-electric machme COIIIP11S'ranged to supply a magnetizing current to said winding of such phase asto establish strong magnetic field poles strengthening the component ofthe Hun traversing the almed portion of the magnetlc path and weakeningthe component traversing the non-alined portion.

26. A dynamo-electric machine comprising a source of magnetic flux, astator member, 21 flux directing member comprising a series of spacedmagnetic conductors circumferentially arranged concentric with thestator, arotor member having a series of spaced magnetic conductorsarranged concentric with those of the first series and differing inmmber therefrom, the three members being traversed by the magnetic flux,whereby the conductors of the two series will radially Z aline at atleast one point progressively as the otoris rotated and thereby form arevolving closed magentic path for the fluxhaving a higher angularvelocity than that of the rotor, and an induced windingcircumferentially disposed in the magnetic field and comprising aplurality of pairs of pole windings the two pole windings of each pairbeing oppositely wound and the two windings being alternately traversedby the flux component of the alined portion of the flux path and theflux component of the non-alined portion of the flux path as themagnetic path and flux rotate, generating thereby a resultant E. M. F.in the induced winding commensurate with the difference between the fluxcomponents.

27. A dynamo-electric machine comprising a source of magnetic flux, astator member, a flux directing member comprising a series of spacedmagnetic conductors circumferentially arranged concentric with thestator, a rotor member having a series of spaced magnetic conductorsarranged concentric with those of the first series and differing innumber therefrom, the three members being traversed by the magneticflux, whereby the conductors of the two series will radially aline at atleast one point progressively as the rotor is rotated and thereby form arevolving closed magnetic path for the flux having a higher angularvelocity than that of the rotor, an induced winding circumferentiallydisposed in the magnetic field and comprising a plurality of pairs ofpole windings the two pole windings of each pair being oppositely woundthe two windings being alternately traversed by the flux component ofthe alined portion of the flux path and the flux component of thenonalined portion of the flux path as the magnetic path and flux rotate,generatin thereby a resultant E. M. F. in the mduced windingcommensurate with the difl'erence between the flux components, and acondenser acted upon by said E. M. F. and arranged to supply amagnetizing current to said Winding of such phase as to establish strongmagnetic field poles strengthening the former flux component andweakening the latter flux com onent.

28. A dynamo-e ectric machine comprisiug a source of magnetic fiux, astator, two concentric rotors mounted co-axially with the stator androtatable in opposite directions, the three members being traversed bythe magnetic flux and each rotor comprising an annulus provided withlongitudinal slots open at one end, a laminated flux conductor disposedin each slot, an annular retaining means on the end of the annulusengaging the conductors and holding them in their slots; the fluxconductors of one rotor differing in number from those of the otherrotor, whereby the conductors of the two rotors will radially aline atat least one point progressively as the two rotors are oppositelyrotated and thereby form a revolving closed magnetic path for the fluxhaving greater an lar velocity than the relative angular ve ocity of therotors, and an induced winding adapted to be traversed by the magneticflux and arranged to have a potential generated therein as the magneticpath and flux revolve.

29. A dynamo-electric machine comprising a flux directing member, arotor member cooperating therewith to produce a revolving flux pathhaving higher angular vel city than that of the rotor, a source ofunidirectional flux radially cutting the two members and distributed bythe revolving flux path to produce a revolving unidirectional ma eticfield, and an induced winding circum erentially disposed within themagnetic field and comprising a pair of oppositely wound pole windings.

In Witness whereof, I subscribe my signature, in the presence of twowitnesses.

ALFONS H. NEULAND.

Witnesses:

Vwron D. Boner, WALDO M. Crmrm.

0011s 0! thin patent may be obtained for five cents each, by addressingthe "Commissioner or ratelh.

Wuhlngton, D. O."

